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Hi all, I'm new to all this so please keep that in mind while reading.This is the code I am using; the file refuses to build because of line 16. The error says "Cannot assign value of type 'ViewController' to type 'UITextFieldDelegate?'".// // ViewController.swift // FoodTracker // // import UIKit class ViewController: UIViewController { //MARK: Properties @IBOutlet weak var nameTextField: UITextField! @IBOutlet weak var mealNameLabel: UILabel! override func viewDidLoad() { super.viewDidLoad() nameTextField.delegate = self // Handle the text field’s user input through delegate callbacks. } //MARK: UITextFieldDelegate func textFieldShouldReturn(_ textField: UITextField) -> Bool { //Hide the keyboard textField.resignFirstResponder() return true } func textFieldDidEndEditing(_ textField: UITextField) { mealNameLabel.text = textField.text } //MARK: Actions @IBAction func setDefaultLabelText(_ sender: UIButton) { mealNameLabel.text = "Default Text" } }Here is the full error output message.020-04-09 14:19:12.897243-0400 FoodTracker[29402:868329] *** Terminating app due to uncaught exception 'NSUnknownKeyException', reason: '[<FoodTracker.ViewController 0x7ffaef406830> setValue:forUndefinedKey:]: this class is not key value coding-compliant for the key nameTypeField.'*** First throw call stack:( 0 CoreFoundation 0x00007fff23e3dcce __exceptionPreprocess + 350 1 libobjc.A.dylib 0x00007fff50b3b9b2 objc_exception_throw + 48 2 CoreFoundation 0x00007fff23e3d899 -[NSException raise] + 9 3 Foundation 0x00007fff258d5796 -[NSObject(NSKeyValueCoding) setValue:forKey:] + 325 4 UIKitCore 0x00007fff485689b6 -[UIViewController setValue:forKey:] + 87 5 UIKitCore 0x00007fff48874ad3 -[UIRuntimeOutletConnection connect] + 109 6 CoreFoundation 0x00007fff23e29fe2 -[NSArray makeObjectsPerformSelector:] + 242 7 UIKitCore 0x00007fff48871cbc -[UINib instantiateWithOwner:options:] + 2192 8 UIKitCore 0x00007fff4856fdbe -[UIViewController _loadViewFromNibNamed:bundle:] + 379 9 UIKitCore 0x00007fff485708f5 -[UIViewController loadView] + 177 10 UIKitCore 0x00007fff48570bf4 -[UIViewController loadViewIfRequired] + 172 11 UIKitCore 0x00007fff485713a1 -[UIViewController view] + 27 12 UIKitCore 0x00007fff48c51ae1 -[UIWindow addRootViewControllerViewIfPossible] + 326 13 UIKitCore 0x00007fff48c5110a -[UIWindow _updateLayerOrderingAndSetLayerHidden:actionBlock:] + 219 14 UIKitCore 0x00007fff48c52195 -[UIWindow _setHidden:forced:] + 362 15 UIKitCore 0x00007fff48c655bc -[UIWindow _mainQueue_makeKeyAndVisible] + 42 16 UIKitCore 0x00007fff48e84d2c -[UIWindowScene _makeKeyAndVisibleIfNeeded] + 202 17 UIKitCore 0x00007fff48177720 +[UIScene _sceneForFBSScene:create:withSession:connectionOptions:] + 1405 18 UIKitCore 0x00007fff48c15561 -[UIApplication _connectUISceneFromFBSScene:transitionContext:] + 1019 19 UIKitCore 0x00007fff48c15898 -[UIApplication workspace:didCreateScene:withTransitionContext:completion:] + 291 20 UIKitCore 0x00007fff4876a160 -[UIApplicationSceneClientAgent scene:didInitializeWithEvent:completion:] + 361 21 FrontBoardServices 0x00007fff36c6091e -[FBSSceneImpl _callOutQueue_agent_didCreateWithTransitionContext:completion:] + 419 22 FrontBoardServices 0x00007fff36c869b1 __86-[FBSWorkspaceScenesClient sceneID:createWithParameters:transitionContext:completion:]_block_invoke.154 + 102 23 FrontBoardServices 0x00007fff36c6b347 -[FBSWorkspace _calloutQueue_executeCalloutFromSource:withBlock:] + 220 24 FrontBoardServices 0x00007fff36c86642 __86-[FBSWorkspaceScenesClient sceneID:createWithParameters:transitionContext:completion:]_block_invoke + 355 25 libdispatch.dylib 0x00000001075eee8e _dispatch_client_callout + 8 26 libdispatch.dylib 0x00000001075f1da2 _dispatch_block_invoke_direct + 300 27 FrontBoardServices 0x00007fff36cac2d9 __FBSSERIALQUEUE_IS_CALLING_OUT_TO_A_BLOCK__ + 30 28 FrontBoardServices 0x00007fff36cabfc7 -[FBSSerialQueue _queue_performNextIfPossible] + 441 29 FrontBoardServices 0x00007fff36cac4d6 -[FBSSerialQueue _performNextFromRunLoopSource] + 22 30 CoreFoundation 0x00007fff23da1c71 __CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE0_PERFORM_FUNCTION__ + 17 31 CoreFoundation 0x00007fff23da1b9c __CFRunLoopDoSource0 + 76 32 CoreFoundation 0x00007fff23da13cc __CFRunLoopDoSources0 + 268 33 CoreFoundation 0x00007fff23d9bf6e __CFRunLoopRun + 974 34 CoreFoundation 0x00007fff23d9b884 CFRunLoopRunSpecific + 404 35 GraphicsServices 0x00007fff38b5ac1a GSEventRunModal + 139 36 UIKitCore 0x00007fff48c19220 UIApplicationMain + 1605 37 FoodTracker 0x000000010737880b main + 75 38 libdyld.dylib 0x00007fff519b910d start + 1 39 ??? 0x0000000000000001 0x0 + 1)libc++abi.dylib: terminating with uncaught exception of type NSExceptionThanks for your help in advance.